皮肤对于声音信号响应的研究

为了研究皮肤响应声音信号的理论,构造了测试皮肤响应声音信号的实验环境。通过实验测试了变压器、平面电极与皮肤听“声”之间的频率电压特性曲线,讨论了皮肤响应声音信号的关键部件与皮肤“听”声效果之间的关系,说明了通过声-电转换实现皮肤“听”声的可行性。     

复杂背景下多姿态人脸图像中的人眼检测

研究了复杂背景下多姿态人脸图像中的人眼检测方法．首先，将得到的图像映射到YCbCr空间，利用肤色在YCbCr颜色空间的分布特性建立肤色模型，分割出肤色并得到人脸的区域；再次，利用人眼的分布特点及自身特性预先设定一系列的规则，通过规则得到可能的人眼区域；最后，设计了人眼模板分布模型，并利用该模型对人眼位置进行最后的确认。实验表明，该方法具有较高的检测速度和检测正确率。     

人脸检测技术在司机工作状态监控系统中的应用

文章提出了一种在实时视频图像中快速检测人脸并检测司机工作状态的的方案,并利用VC设计了软件将其实现。对摄像机采集的日间图像,先进行光线补偿和中值滤波,然后采用肤色检测定位人脸,最后运用双眼模板判断司机的工作状态;对于夜间图像,采用差分方法进行处理。实验证明该方法快速,准确率高,有效适用于实际工作环境。     

Similarity solutions to a laminar boundary layer problem in power law fluids

A suitable similarity transformatiopn is introduced to reduce the laminar boundary layer equations of power law fluids to a class of singular nonlinear two-point boundary value problems.The skin friction and shear stress distributions for boundary layer flow over a moving flat plate are investigated by utilizing the shooting technique.Results indicate that for each fixed value of the power law exponent n or the velocity ratio parameter ξ,the skin friction and shear stress decrease with the increasing of n or ξ respectively.     

Sex- and site-dependent variations in the thickness and mechanical properties of human skin in vivo

A new method for the in vivo characterization of the physical properties of skin is presented. This comprises an ultrasound device to measure the vertical displacement of the surface of the skin, as well as its thickness and that of the hypodermis under suction. In combination with this, a mathematical model is used to calculate the following skin parameters: Young's modulus, the initial stress and an index of non-elasticity. These parameters were evaluated from the volar forearm and the forehead of 30 male and 30 females, of similar ages (28 +/- 6-years-old). The sensitivity of the testing procedure, allowing the characterization of the mechanical parameters of the skin, easily differentiated these two sites, and in some cases, differences between women and men were demonstrated. The main results showed for both sexes that the thickness (P = 0.0001), Young's modulus (P = 0.0001), and the index of non-elasticity (P = 0.0001) were greater for the forehead than for the ventral forearm, but that the initial stress was lower (P = 0.0001). The results show that the skin is thicker, stiffer and less tense and elastic on the forehead than on the ventral forearm, suggesting structural differences between these two sites (collagen fibre network, elastic fibres, epidermis, stratum corneum, microvascularization, actinic damage, presence of sebaceous glands, etc.). It is hoped that this device will be useful for the evaluation of certain skin disorders (scleroderma, Ehlers-Danlos syndrome, cutis laxa, oedema, etc.) and their therapy, as well as being a useful tool in skin ageing and cosmetic product assessment.     

钢板混凝土井壁极限承载能力的塑性解

根据虚功方程、平衡条件、强度准则以及流动法则写出钢板混凝土井壁满足的基本方程并求解，抗到了钢板混凝土井壁的极限承载能力的塑性解．计算结果与试验结果吻合较好，从而证明采用这种方法求解的结果是可靠的．最后根据计算结果和平衡条件，建立了该种井壁极限承载能力的计算公式，可供设计时参考．     

Applications of specialized coils for high-resolution MRI on a whole-body scanner

To investigate the application of a mini-coil surface system for high-resolution MRI, 60 volunteers were examined in a 1.5-T whole-body scanner. Two replaceable probe heads were available: a circular 2.5-cm coil and a quadratic 5-cm coil, both of which were placed directly on the skin. The skin layers, Achilles tendon and finger joints were examined with the 2.5-cm coil and a FOV of 25 × 25 mm². A matrix of 256 × 256 pixels resulted in a pixel size of 0.098 × 0.098 mm². For imaging of the carpal tunnel, the 5-cm coil was used in transverse orientation. The FOV was 50 × 50 mm² so that a matrix of 256 × 256 pixels led to a pixel size of 0.195 × 0.195 mm². The resulting spatial resolution permitted visualization of the epidermis, dermis and subcutis, resulting in clear definition of anatomical detail of the musculoskeletal system. MRI measurement of skin-layer thickness did not correlate with histometric data (p<0.05). This discrepancy was due in part to shrinkage of the tumor specimen on histologic preparation. Other causes include the motion artifacts and the limited accuracy of determining thickness on the MRI display unit.     

小湖羊皮光面毛革的鞣前处理

本文对产于浙江杭嘉湖地区及太湖流域的名贵皮张—小湖羊皮的鞣前处理进行了实验研究,对选皮、浸水、软化、浸酸等工序的操作工艺进行了优选,所得结果对于小湖羊皮光面毛革的生产具有指导意义。     

海水有鳞鱼皮制革工艺的初步研究

本文针对海水有鳞鱼皮的组织构造特征,对鱼皮制革工艺过程中的几个主要工序以及如何保持鱼皮特有的外观花纹,提高鱼皮产品高附加值等问题进行了初步研究,并对我国鱼皮制革的开发提出了几点建议。     

热核中子皮厚度的微观研究

本文从扩展Skyrme相互作用出发,利用有限温度自洽半经典(FTSCSC)方法,确定热核核子密度ρ_q.(q=n、p),微观地研究了热核~(40)Ca、~(90)Zr、~(120)Sn在不同温度下的中子皮厚度.